Siemens SCALANCE XB-200 Web Based Management page 150

Configuring with Web Based Management
5.5 The "Layer 2" menu
Table 2 has the following columns:
● Port
Shows the available ports.
● Spanning Tree Status
Specify whether or not the port is integrated in the spanning tree.
Note
If you disable the "Spanning Tree Status" option for a port, this may cause the formation
of loops. The topology must be kept in mind.
● Priority
Enter the priority of the port. The priority is only evaluated when the path costs are the
same.
The value must be divisible by 16. If the value that cannot be divided by 16, the value is
automatically adapted.
Range of values: 0 - 240.
The default is 128.
● Cost Calc.
Enter the path cost calculation. If you enter the value "0", the automatically calculated
value is displayed in the "Path Cost" box.
● Path Cost
This parameter is used to calculate the path that will be selected. The path with the
lowest value is selected as the path. If several ports of a device have the same value for
the path costs, the port with the lowest port number is selected.
If the value in the "Cost Calc" field is "0", the automatically calculated value is displayed.
Otherwise, the value of the "Cost Calc" field is displayed.
The calculation of the path costs is largely based on the transmission speed. The higher
the achievable transmission speed is, the lower the value of the path costs.
Typical values for path costs with rapid spanning tree:
– 10,000 Mbps = 2,000
– 1000 Mbps = 20,000
– 100 Mbps = 200,000
– 10 Mbps = 2,000,000
The values can, however, also be set individually.
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SCALANCE XB-200 Web Based Management
Configuration Manual, 04/2015, C79000-G8976-C360-02